Teachers often appear claiming to possess hidden additional teachings from the original system and symbols unknown to other schools et cetera, but none of these claims are substantiated with evidence that supports the additional material that they use. Some current examples (but certainly not a comprehensive list) of such schools are Dr Barbara Weber Ray's "Radiance Association" (who claim to possess additional attunements, symbols and levels) and Dr Ranga Premaratna's "Reiki Shin Kei Dō/Ennersense/Buddhō" (who claims to possess the original Buddhist Reiki system as well as additional symbols, initiations and meditations). Although (among many others) both organisations also claim they possess additional authentic supplementary teachings, neither school provides evidence to substantiate these claims. Takata’s students, particularly the teachers present during her training, dispute Dr Weber Ray’s claims. Dr Ray demands strict obedience from her students and deregisters them if they disobey her, as does Dr Premaratna. Dr Premaratna nowadays claims that his teacher, Seiji Takamori, was not really taught and initiated into Reiki by Hawayo Takata, although Takata herself stated that Takamori was one of her students. He additionally claims that although Seiji Takemori was a teacher, he only initiated Dr Premaratna alone. At one time however his training materials claimed no special lineage regarding Seiji Takemori, and instead agreed with Hawayo Takata's statement that she alone was his teacher.

There are many questions remaining around Reiki practice, and many of these are currently being answered by the newly rediscovered Japanese lineages. These lineages can in fact produce historical evidence to support their claims, and although perhaps the actual nature of "Reiki" energy is a mystery, the system of the "usui shiki ryoho" seems to be becoming clearer.